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  2. NASA's Space Place - Wikipedia

    en.wikipedia.org/wiki/NASA's_Space_Place

    [4] The site includes informative articles, hands-on activities, and interactive web games. [2] [3] In addition to its content geared toward children, there are resources for parents and educators. It was one of the first NASA websites to produce a companion Spanish language site. Space Place is produced by a team at the Jet Propulsion ...

  3. List of unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Axis of evil: Some large features of the microwave sky at distances of over 13 billion light-years appear to be aligned with both the motion and orientation of the solar system. Is this due to systematic errors in processing, contamination of results by local effects, or an unexplained violation of the Copernican principle ?

  4. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The outermost region of the Solar System is the theorized Oort cloud, the source for long-period comets, extending to a radius of 2,000–200,000 AU. The closest star to the Solar System, Proxima Centauri, is 4.25 light-years (269,000 AU) away. Both stars belong to the Milky Way galaxy.

  5. Discovery and exploration of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Discovery_and_exploration...

    The Solar System is one of many planetary systems in the galaxy. [1] [2] The planetary system that contains Earth is named the "Solar" System. The word "solar" is derived from the Latin word for Sun, Sol (genitive Solis). Anything related to the Sun is called "solar": for example, stellar wind from the Sun is called solar wind.

  6. Reach: A Space Podcast for Kids - Wikipedia

    en.wikipedia.org/.../Reach:_A_Space_Podcast_for_Kids

    In one of the episodes the show has a live interview with NASA astronauts in space aboard the International Space Station. [4] [5] Marshall and DuFort had previously collaborated on improvisational comedy at The Second City. [6] The show interviewed Chris Hadfield, the first Canadian to walk in space. [7] [8] The podcast is produced in Chicago. [9]

  7. Natural satellite - Wikipedia

    en.wikipedia.org/wiki/Natural_satellite

    Io is the most volcanically active body in the Solar System, while Europa, Enceladus, Titan and Triton display evidence of ongoing tectonic activity and cryovolcanism. In the first three cases, the geological activity is powered by the tidal heating resulting from having eccentric orbits close to their giant-planet primaries.

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